<template>
    <div class="login-wrap">
        <div class="ms-login">
            <div class="ms-title">后台管理系统</div>
            <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="0px" class="ms-content">
                <el-form-item prop="username">
                    <el-input v-model="ruleForm.username" placeholder="username">
                        <el-button slot="prepend" icon="el-icon-lx-people"></el-button>
                    </el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input type="password" placeholder="password" v-model="ruleForm.password" @keyup.enter.native="submitForm('ruleForm')">
                        <el-button slot="prepend" icon="el-icon-lx-lock"></el-button>
                    </el-input>
                </el-form-item>
                <el-form-item prop="captchaCode" v-if="showCaptcha">
                  <el-input
                      v-model="ruleForm.captchaCode"
                      placeholder="请输入验证码"
                      style="width: 60%"
                  >
                    <el-button slot="prepend" icon="el-icon-picture"></el-button>
                  </el-input>
                  <div class="captcha_code">
                    <img :src="captcha" @click="generateImg" alt="验证码"/>
                  </div>
                </el-form-item>
                <div class="login-btn">
                    <el-button type="primary" @click="submitForm('ruleForm')">登录</el-button>
                </div>
                <p class="login-tips">Tips : 用户名和密码随便填。</p>
            </el-form>
        </div>
    </div>
</template>

<script>
/**
 * 后期要重新设计
 */
export default {
    data: function(){
        return {
          showCaptcha:false,
          captcha:'',
          ruleForm: {
              username: '',
              password: '',
              captchaCode:'',
              captchaKey:''
          },
          rules: {
              username: [
                  { required: true, message: '请输入用户名', trigger: 'blur' }
              ],
              password: [
                  { required: true, message: '请输入密码', trigger: 'blur' }
              ],
              captchaCode: [
                  { required: true, message: '验证码不能为空', trigger: 'blur' }
              ]
          }
        }
    },
    created(){
        localStorage.removeItem("userName");
        localStorage.removeItem("token");
        this.generateImg();
    },
    methods: {
        submitForm(formName) {
            this.$refs[formName].validate((valid) => {
                if (valid) {
                    this.$post('/api/auth/login',{
                        "userName": this.ruleForm.username,
                        "password": this.ruleForm.password,
                        "captchaCode": this.ruleForm.captchaCode,
                        "captchaKey": this.ruleForm.captchaKey,
                    }).then((res) => {
                        if(res.status===1){
                            this.$message.success('登录成功!');
                            this.$store.commit('setPermissions',res.data.permissions);
                            localStorage.setItem('userName',res.data.userName);
                            localStorage.setItem('token',res.data.token);
                            this.$router.push('/');
                        }else{
                            this.$message.error(res.message);
                            this.$refs['ruleForm'].resetFields();
                            this.generateImg();
                        }
                    });
                }
            });
        },
        generateImg(){
          const imgUrl = '/api/auth/login/captchaImg';
          //生成图像
          this.$fetch(imgUrl).then(res => {
            if(res.status === 1){
              if(res.data.key !==''){
                this.captcha =res.data.imgData;
                this.ruleForm.captchaKey =res.data.key;
                if(!this.showCaptcha){
                  this.showCaptcha = true;
                }
                setTimeout(this.generateImg, 60*1000);
              }
            }
          })
        }
    },
}
</script>

<style scoped>
    .login-wrap{
        position: relative;
        width:100%;
        height:100%;
        background-image: url(../assets/img/login-bg.jpg);
        background-size: 100%;
    }
    .ms-title{
        width:100%;
        line-height: 50px;
        text-align: center;
        font-size:20px;
        color: #fff;
        border-bottom: 1px solid #ddd;
    }
    .ms-login{
        position: absolute;
        left:50%;
        top:50%;
        width:350px;
        margin:-190px 0 0 -175px;
        border-radius: 5px;
        background: rgba(255,255,255, 0.3);
        overflow: hidden;
    }
    .ms-content{
        padding: 30px 30px;
    }
    .login-btn{
        text-align: center;
    }
    .login-btn button{
        width:100%;
        height:36px;
        margin-bottom: 10px;
    }
    .login-tips{
        font-size:12px;
        line-height:30px;
        color:#fff;
    }
    .captcha_code{
      display: inline-block;
      height:36px;
      float:right;
    }
    .ms-content >>> .el-input__inner{
      height:36px;
    }
</style>